wind band /standard whats the difference???Cheers.

 

Wideband lambda sensors are able to accurately measure, as the name suggests, air:fuel ratio over a wide range. Narrowband sensors are designed to accurately measure AFR only around the stoichiometric ratio of 14.7 to 1.

 

I have a sensor in my down pipe thats a lot smaller that std lamba,think it mite be held in with 12/13mm is this wide band??if not what is it.cheers.

 

What type and model year of car do you have (and which downpipe, if it isn't standard)?

 

I would have thought it was exhaust gas temp sensor or cat on fire sensor mate.

 

96 555 import.has 3inch full decat.The cable has a metal woven sleave,and cant see were it leads to.

 

The little one at the bottom will be a heat sensor, the big one at the top will be a narrow band lambda. A narrow band lambda can only tell you if the AFR is about or below 14.7. Wide band and narrow band sensors are the same size AFAIK.

 

sounds like exhaust temp as stated above but would have thought it would have went to a temp gauge

 

Dont have any gauges and its at the top end of the pipe.
I will try and find were it ends up tommorow.Thanks for the input guys.

 

its not for a gauge, it brings a red cat on fire warning light on.

 

cat on fire light? glad i dont have a cat anymore lol

 

Last time i saw a cat on fire it was running across the road away from the bonfire display!!

 

lol ive seen planty cats on fire/glowing red hot

classic is steam cleaning an engine, water pools around the plug/lead - missfires dumping lots of unburnt feul into cat, bingo

zetecs were great for this

with wideband sesnors is it still just 1 sensor for the 4 cylinders?

 

 

Yes...one sensor to four cylinders

Some setups can have a wideband sensor on each branch of the exhaust headers. If you have the facility on your ECU you can adjust individual cylinder fuel trims to get AFR's absolutely spot on per cylinder. Unless your injectors are perfectly matched down to the last cc and to within 0.1% of eachother they will all be slightly out and is normal. It's not such a big deal for your average scooby unless they are all out by more than about 2%, in which case you will get some cylinders running much leaner/richer than the others and can cause lumpy idle, rough low speed running, misfire etc etc....

Running a wideband with narrowband simulation for your ECU is not a bad way to go and ensures that you get correct and accurate readings for both wideband and narrowband outputs from a single source. The OEM narrowband sensor isn't as accurate as it could be so you will see some differences when logging AFR's from both side by side. Just keep your wideband calibrated regularly and you should see decent service from it!!

I don't know about AEM. PLX, TechEdge widebands but the Innovate LC-1 works well and is tried and tested across motorsport of all kinds.